Strap joint



Aug. 27, 1935. w. c. CHILDRESS STRAP JOINT Filed Feb. 10, 1932 IIIIIIIIIIIIIIIIIIII",

I, IIIIIIIIIIIIIIIIIIIQ'Q Patented Aug. 27,, 1 935 7 312,012,618 1i; j; 1;"; .,:Willi9.m annual-e55, Oak Park, I assign" to a -Acme SteelVCompany, 'Chicagoylll a corpora? v tion ot lllinois This invention relate {improvements strap joints and its purpose .1s to provide improved means ior uniting thoverlapping ends of 1a strapjfor binder such asfemployed for forming bales, reinforcing boxesofp'ackag es, and binding a numberof packages together. 'Itfh'as' here-, tofo're been the usual 'comi'nercialpractice to unite the endsof metalstraps and binders by 1 .4 means of a. strap seal such as that "described and claimedinthe United Statespatent of Ralph H. Norton, No. 1,260,016, datedwMarch lg, 191 but; while an 'e'fiicient joint ma be. tor-med by the invention of that patent, it involves the use of a separate sleeve or the like for enclosing the "overlapping strap: ends so'that the operator must manipulate this additionalelernentandkeep in stock a supply of sleeves for'straps of v'arious widths.

' to :provide parts adapted tov prevent frelative.

The principal object .ofthe present invention to provide improved means of andfa method for forming a strap joint according to which the overlapping strap nd e united by: hfiin jfl r formed to interlock with each other in such ,a

mannerthat relative transverse and endwise a movementgof the two strap-ends is --'efiectively V prevented. v, A further object of -the invention I is to provide an improved: strap joint in which the overlapping strap endsare rolled or 'curled at their edges to form longitudinal telescoping beads adapted to prevent 1 relative; transverse separa-, tion of the strap ends; in combination withtranse versely extending crimps formed in thestrapends to: prevent relative longitudinal separation there- -of..' Still another object oftheinvention is to provide an improved strap 'joint in whichuthe overlapping strap ends are rolled;- at their edges transverse separation in combination with inter-"- locking shoulders formed by crimping the overlapped parts ofthe strap and by-tran sversely shearing marginal portions ofthe strap ends. A further object of the inventionis'to provide an' improved strap joint in which the marginal rolling of the strap ends is combined with two or more series of transverse cuts formed by shearing marginal portions of the strap ends to provide shoulders adapted to prevent relative longitudinal movement of the two ends. Other objects relate to various features of construction and details of the improved method such as will appear more fully hereinafter.

The nature of the invention will be understood from the following specification taken with the accompanying drawing in which the improved 7 npplication liehruarw10, 193?Serial NoQ'592,052f

" 1 Qselaimss (01. 24-20) method is explained "tonne-ea h withith'ree embodiments of the'im'provedjointf Inthe drawing, a Figurel shows atopplan'view of two'ovep lapping strap ends preliminary to' the formation 7 or the Joint of the present invention;

' "Figi 2 sh" ws a top plan iewjoffthe overlapping strap ends after having formed thereinv the fim proved joint of the present invention; I V Fi'gl3 shows a side elevation' of the joint illustratedin'Fig.2;' Y

v ig; ,4 shows a bottom plan vie 'ofjthefim proved jointshown in Fig, 2; n

g "Fig, ,5 shows, an enlarged vtransversefjsection takenon' the line.5-5 or Fig. 2;

.Fig. 6 shows an enlarged 'transverse'l'j'section taken on'the line 65-76 of Fig. 2: T i

Fig. 7 vshows a bottom plan Viewv of a modified form of joint ,embodyingthe principles geniepresent invention; 7 o u u Fig. 8 shows a top planY-viewjof' astrapjjoint embodying another Tmodification of the'inven tion; and p r Fig. 9 shows an enlarged.transvers ef: section I 7 taken on theline91-9ofFig 8; H @Refgrringto the form of the invention mus; esteem Figs, use, inclusive, of the drawing; itwillbe seen that theinvention is applied ltothe overlapping ends) and I l oI aflat steel strap such as is commonly; employed as v oal flexible binder, Afteroverlapping the ends of t he strapv in this way, marginal portionsof'the overlapping parts of the strap'fends are bent transverselyito form two telescoping" beads along the' edgesxbt the strap'ends, but this rollingoperation is pref erablv preceded by shearing 'the'overlapping' en s i,

along'the lines 12 to 'form cuts jwhich eXtend in-j wardly at. right angles to the length, of the strap, After forming these cutsTlZ, the 'marg'i'fial por tions of the overlapping strap ends, between the cuts, are rolled downwardlv and inwardly to form telescoping beads [0 and HF? Ion the overlapping ends as shown particularly in Eig. 5."" 'I'he beads" on the under strap may complete beads'of snb stantially circular cross section, as illustrated,

somewhat less than the complete, beads due to their greater circumference. When the marginal portions of the strap ends are rolled in the regions-l3, between the cuts I2, the metal at the ends of the beads is turned downwardly'and in wardly, at the cuts l2, to form interlocking overlapping shoulders as shown at M so that relative endwise movement of the strap ends is thereby prevented. l

while the beads on the uppermost strap may be Y beads H1 and H are formed, are preferably crimped-transversely as shown at I5. These crimps are formed by'bending the metal of the marginal beaded portionsof the strap transversely while maintaining surrounding areas of the strapin ,th eir originali'orm: results in flattening out=the beads of the'srrap at' the "points where the crimping takes place, as shown:

at I5 and the crimps which extend downwardly; transversely to the plane of the strap, create e v of forming these joints, it will be understood that mentin addition to insuring furtheragainstrela .ithe inventionvmaylDeconstructed in various em'- tive transverse separation-of the strap ends shoulders which prevent relative endwise 'mov- Those portions of the strap ends which lie between the beads and betweenthe crimps 15. are

retained in their original fiat 'sl'ia'pe as shown at I6.

In Fig.1? of the drawingthere is illustrated a inod ifidform or; thejinvenpio in which 'the'two strap ends 20," and 21 have marginal portions thereof .rolled or-bent inwardly .to form'niarginal,

telescoping 2 2,. These beaidsjidiininish' to shown at 22' :so' may; interlocking sh provided for preventing irelative "endwise ffiQYG:

- mam eveh'thougli the strap is' nots hearedtransg the forrrf of versely at rn 'enqs'er the beads, as in v Lbejad. 22 111,-

the invention first described? The eludes, inner and outer beadsonthe'two overlap ping s'trap eIidsand these haveija telescopingflen gagernent witheach other along' each 'ed'geoIJthe strap so" that'they 'effectivelypreventfrelative trated still another modification of the invention in which the two s rap ends" 25;,and 26 are over lapped and then,"while the: strap ends areheld inalig'nment *with each othenf'portions of the strap ends are rolled or'bent inwardly and'downwardly to'form marginal beads 2 8 which include telescopingbea'ds iornied tw ne-1W0 strap ends so ,that they are located one within the other as shown in ragga to prevent relativeseparation of the parts. When these marginal portions of: the straps areirolled or bentito,iorrnthe beadsj'the portionsof' the strap attheends of the beads are bent transversely to ram; interlocking; abutting shoulders as shown. at 29 so thatrelati'veendwise movement of the strap ends is resisted by these shoulders. In addition," intermediateparts of the strapends, between the shoulde'rs 29 on the same side of the strap, are transverselyshearedalong lines 30 and the portions of jthejnietal adjacent J p the cuts 30 are benttransversely to -iori'n downf pai s qut las ra s rse :defle te q-i rm wardly deflected lugs 3|, thus creating additional interlocking shoulders which prevent relative endwise movement of the strap ends. Two pairs of cuts 30 are preferably provided on each side of the strap ends so that the metal between the outs may be bent downwardly to form two lugs r 3| on each side, but a single cut maybe employed with the metal bent downwardly at one side of the cutter a; single pair oil-cuts illmaybe provided the scope of the appended claims.

ibodiments" and practiced in various ways within ends havingi parts of said marginal"portions ing' shoulders. 7 p v m "f'2ZA stra-p join I "mprisingfoverlapping strap ends-having spaced' cutsyextending inwardlyiijom eacn edge thereof with the metal between each 1 urried' inwardlyto'form tel e'scop g parts alo g' weac'hfedge o ffthe strap-en s, in-I terme'diate portions o1.v said inturned parts"'being tra sverselydeflected to iforin'interlocking shoul'? d z x. i 5-, J =-3. A strap oint, comprising overlappizigi strap thereof deflected transversely" o :f ormjinterlock' ends {having edge portions thereof turned in-- wardly one vvithin fthe, "other: along each side" oi the -strap ends to iorin substantially cylindrical telescoping tubular parts, said strap endshav in'g 'marginal portions 'of fsai'd 'intiirried tubular parts transversely deflected; to form interlocking shoulders, the portions of said strap ends=betwee n' said interned -tubiilarj portions and said trans versel'y deflected portions' bein'gin fla't condition:

4; fi st rap joint-comprising overlapping" strap ends having edge portioiis thereof turnedinward 'iy one 'within the other w formtelescoping tubi'r-f la r parts"of-; sub'stantia11y cylindrical form along each edge of the strap nd's'; the-marginar'pob tio'ns of 'saiddnturnew parts beingtransversely sheared, -the" metahadjacentgthe sheared part being transversely 'defiect'ewto fo'rm interlocking shouldersz- 5; A strap Joint I comprising over-lapping strap ends, the metal'along' a partofeachedge'o'f said strap :e'n'ds being turned' inwardly. to .fornr =tele=' scoping tubulanparts "of substantially: cylindrical for-In? therinturnedz parts of: each ledge; of: i said strap. being. transversely. :shearedlbetween; their ends; torform a pair ,of spaced cuts; at eachiside ofthekstrap 'er,1 d ;th metal b wee -ea h o said 

